| Presentation | 2019-07-17 Observation of Raindrop generation with High Resolution W-band Cloud Radar FALCON-I Toshiaki Takano, Keisuke Hikawa, Tomohiro Arai, Hyuga Morita, Ryo Fueda, Yohei Kawamura, Hiroyo Ohya, Hiroyuki Nakata, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have originally developed the FMCW (Frequency Modulated Continuous Wave) Doppler radar named FALCON-I in W-band 95 GHz at Chiba university and use it for cloud observations. FALCON-I consists of two 1m-diameter antennas and has high spatial resolution of 0.18 degree FWHM, which corresponds to 15m FWHM at the height of 5 km. A high range resolution of 48m is realized with the FMCW type radar, which is about several times higher than that of normal pulse type radar. Output power of FALCON-I is as small as 0.5W, which is much smaller than usual pulse type radars. Although its small output power, FALCON-I has enough sensitivities to observe thin clouds at high altitude up to 15 km and has high resolution in Doppler measurements. Using FALCON-I, we have observed melting layer at the cloud bottom, in which ice particles of cloud are melting to water particles and generate raindrops. We observe these raindrops are gathered up to the sizes of 2mm in diameters and accelerated downward. These results show that observations with FALCON-I are useful to investigate mechanism of generation of raindrops in clouds. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | W-band radar / FMCW radar / cloud profiling radar / observation of clouds / rain drops / distribution of diameters / melting layer |
| Paper # | AP2019-22 |
| Date of Issue | 2019-07-10 (AP) |
| Conference Information | |
| Committee | AP / SANE / SAT |
|---|---|
| Conference Date | 2019/7/17(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tohoku Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Subsurface Electromagnetic Measurements, Sattelite Communication, Radio propagation, Antennas and Propagation |
| Chair | Qiang Chen(Tohoku Univ.) / Akitsugu Nadai(NICT) / Fumihiro Yamashita(NTT) |
| Vice Chair | Satoru Kurokawa(AIST) / Hiroyoshi Yamada(Niigata Univ.) / Makoto Tanaka(Tokai Univ.) / Hisashi Sujikai(NHK) / Hiroyasu Ishikawa(Nihon Univ.) |
| Secretary | Satoru Kurokawa(Mitsubishi Electric) / Hiroyoshi Yamada(Tokyo Univ. of Agric. & Tech.) / Makoto Tanaka(Univ. of Electro-Comm.) / Hisashi Sujikai(Mitsubishi Electric) / Hiroyasu Ishikawa(NTT) |
| Assistant | Michitaka Ameya(AIST) / Ryo Natsuaki(Univ. of Tokyo) / Masato Yamanashi(Mitsubishi Space Software) / Shunichi Futatsumori(ENRI) / Shinobu Nanba(KDDI Research) / Takuya Okura(NICT) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation / Technical Committee on Space, Aeronautical and Navigational Electronics / Technical Committee on Satellite Telecommunications |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Observation of Raindrop generation with High Resolution W-band Cloud Radar FALCON-I |
| Sub Title (in English) | |
| Keyword(1) | W-band radar |
| Keyword(2) | FMCW radar |
| Keyword(3) | cloud profiling radar |
| Keyword(4) | observation of clouds |
| Keyword(5) | rain drops |
| Keyword(6) | distribution of diameters |
| Keyword(7) | melting layer |
| 1st Author's Name | Toshiaki Takano |
| 1st Author's Affiliation | Chiba University(Chiba Univ.) |
| 2nd Author's Name | Keisuke Hikawa |
| 2nd Author's Affiliation | Chiba University(Chiba Univ.) |
| 3rd Author's Name | Tomohiro Arai |
| 3rd Author's Affiliation | Chiba University(Chiba Univ.) |
| 4th Author's Name | Hyuga Morita |
| 4th Author's Affiliation | Chiba University(Chiba Univ.) |
| 5th Author's Name | Ryo Fueda |
| 5th Author's Affiliation | Chiba University(Chiba Univ.) |
| 6th Author's Name | Yohei Kawamura |
| 6th Author's Affiliation | Chiba University(Chiba Univ.) |
| 7th Author's Name | Hiroyo Ohya |
| 7th Author's Affiliation | Chiba University(Chiba Univ.) |
| 8th Author's Name | Hiroyuki Nakata |
| 8th Author's Affiliation | Chiba University(Chiba Univ.) |
| Date | 2019-07-17 |
| Paper # | AP2019-22 |
| Volume (vol) | vol.119 |
| Number (no) | AP-120 |
| Page | pp.pp.7-10(AP), |
| #Pages | 4 |
| Date of Issue | 2019-07-10 (AP) |